10 Questions
What is the pH of a solution if it has a pH less than 7?
Acidic
What type of oxides are non-metallic oxides classified as?
Acidic
What is the product of the reaction between a non-metallic oxide and a base?
Salt and H2O
What is the reaction between an acid and a metal carbonate?
Salt and CO2
Which of the following salts is formed by the reaction between a metal oxide and an acid?
Metal salt
What is the pH of a solution if it has a pH equal to 7?
Neutral
What is the reaction between a base and a metal hydrogen carbonate?
No reaction
What type of salt is formed by the reaction between a metal oxide and an acid?
Normal salt
What is the reaction between a non-metallic oxide and a metal oxide?
Salt and H2O
What is the nature of a solution with a pH greater than 7?
Alkaline
Study Notes
Salts and Acid-Base Reactions
- Salts are the products of an acid-base reaction.
- Neutralization reaction: a reaction between an acid and a base to give salt and water.
Types of Salts
- Neutral salts: NaCl, Na2SO4, KCl
- Acidic salts: NaHCO3, NH4Cl
- Basic salts: NaOH, Ca(OH)2
Common Salts
- Sodium chloride (NaCl)
- Sodium hydroxide (NaOH): NaCl + 2H2O → NaOH + Cl2 + H2
- Bleaching powder: Ca(OH)2 + Cl2 → CaOCl2 + H2O
- Baking soda: NaCl + H2O + CO2 + NH3 → NH4Cl + NaHCO3
- Washing soda: Na2CO3 + 10H2O → Na2CO3.10H2O
- Plaster of Paris: CaSO4.2H2O → CaSO4.H2O + 1 1/2 H2O (heat)
- Gypsum: CaSO4.2H2O + 1 1/2 H2O → CaSO4.2H2O
pH of Solutions
- pH < 7: acidic
- pH > 7: basic
- pH = 7: neutral
Reactions of Non-metallic Oxides with Bases
- Non-metallic oxides are acidic in nature.
- Reaction: Non-metallic oxide + Base → Salt + H2O
- Examples: CO2 + Ca(OH)2 → CaCO3 + H2O, CO2 + NaOH → NaHCO3 + H2O
Reactions of Acid and Base
- Reaction: Acid + Base → Salt + H2O
- Reaction: Acid + Metal Hydrogen Carbonate → Salt + CO2 + H2O
- Reaction: Acid + Metal Oxide → Salt + H2O
- Reaction: Base + Metal Hydrogen Carbonate → No Reaction
- Reaction: Base + Acid → Salt + H2O
- Reaction: Base + Non-metallic oxide → Salt + H2O
This quiz covers the basics of pH scale, acidic and basic nature, and their reactions. It includes identification of salts and understanding of acid-base chemistry.
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